Revolving harrow.



WrrNEssEs ,Z3/"02072 C. V. BROWN & A. RUSSELL.

REvoLvlNG HARRow. Y APPLICATION FILEDAPR. 10.1917.

Patented Nov. 2?, 1917.

2 SHEETS-sum 1.

C. V. BROWN 6L A. RUSSELL.

REvoLvmG HARow. APPLICATION FILED APR- O. 19|?.

v INVESTOR WiTNEssEs 5 Avronmm' @MTE @TATFQ FFllF@ CLYDE V. BROWN AND ARCHER RUSSELL, OF OHIO CITY, OHIO.

BEVOLVING HARROW.

Specicaton of Letters Patent.

Patented Nov. 2?, i213.

Application filed April 10, 1917. Serial No. 161,040.

To all fw hom t may concern.' p

Be it known that we, CLYDE V. BROWN and ARCHER RUSSELL, citizens of the United States, residing at Ohio City, in the county of Van Wert and State of Ohio, have invented new and useful Improvements in Revolving Harrows, of which the following isa specification.

This invention relates to harrows and particularly to revolving harrows in which a barrow head or frame of circular form and having downwardly projecting teeth is carried by a substantially vertical shaft mounted for rotation ina suitable carrying frame.

One object of the present invention is to produce a simple and improved construction whereby 4the harrow head and its operating means may be adjusted vertically to place the teeth out of or into engagement with the ground and also for regulating the depth of penetration.

A further object of the invention is to provide simple and improved means whereby the harrow may be thrown in or out of operation and the direction of rotation reversed.

Further` objects ofthe invention are to simplify and improve the general construction and arrangement of the parts constitutingthe invention.

W'ith these and other ends in view which will readily appear as the nature of the invention is better understood, the same consists in the improved construction and novel arrangement and combination of parts which will be hereinafter fully described and particularly pointed out in the claims.

1n the 'accompanying drawing has been illustrated a simple and preferred form of the invention, it being, however, understood that no limitation is necessarily made to the precise structural details therein exhibited, but that changes, alterations and modifications within the scope of the claims may be resorted to when desired.

n the drawings:

Figure 1 is a top plan view of a harrow constructed in accordance with the invention.

Fig. 2 is a longitudinal vertical sectional view.

Fig. 3 is a transverse sectional view taken on the line 3--3 in Fig. 1. t

Fig. 4 is an inverted plan View` of the harrow head.

Fig. 5 is a detail view of a clutch used in connection with the ground wheels of the device.

Fig. 6 is a sectional detail view taken on the line 6 6 in Fig. 4 top side up.

Fig. 7 is a sectional detail view taken on the line 7-7 in Fig. 6.

Fig. 8 is a sectional detail view taken on the line 8--8 in Fig. 2.

Corresponding parts in the several figures of the drawings are denoted by like characters ofreference. y

The carrying frame of the improved device which is composed of 'forwardly convergent side bars 15, 15, a frontcross bar 16 and a rear cross bar 17, is supported near its rearward end on an axle 18 having ground wheels 19, said axle being mounted for rotation in bearings 20. Each of the ground wheels is equipped with a clutch device 21 including` spring actuated dogs 22 engaging a ratchet wheel 23 on the axle whereby the latter will be rotated when the machine advances and will remain stationary'when the machine is moved in a rearward direction, and also facilitating turning of the machine. The forward end portion of the frame is supported by a caster wheel 24 carried by a. shank 25 with which a clevis 26 is connected for the attachment 0f a draft appliance whichjhas been shown as consisting of an ordinary double tree 27 A. seat 28 for the driver or operator is mounted on the rear cross bar 17 of the frame.

The main frame is equipped with a bearing or bea-rings 29 preferably of an antifriction type, as best seen in Fig. 2, where the said bearings have been shown as being provided with anti-friction rollers 30. Supported for rotation in the bearings 29 is a substantially vertical shaft 31 carrying at its lower end the harrow head generally designated by H. This harrow head has been shown as being composed of a circular rim 32 of angle iron, said rim being connected with a hub 33 by means of radial spokes 34. The shaft 31 carries above the harrow head a sprocket wheel 35, said sprocket wheel being supported on blocks 36 whereby it is spaced from the harrow head, said blocks having beveled faces 37 whereby the chain 38, which is trained over said sprocket wheel, will be maintained in engagement therewith without danger of slipping or sagging to a non-engaging position. Upwardly curved lugs39 are also connected with the sprocket wheel 35 at intervals, said lugs projecting beyond the rim of the sprocket wheel to prevent the chain from jumping upward and out of engagement therewith. The lugs 39, sprocket wheel 35 and blocks 3G are assembled with the harrow head by bolts 40 passing through the several parts referred to and also through the spokes of the harrow head.

Therim V3E?. and the spokes 34 of the harrow head are equipped with downwardly extending teeth 41, each of said teeth being formedwith a shoulder 4Q and with an upwardly extending threaded shank 43 The shanleof each tooth engages a threaded socket 44 in a block 45 having laterally eX- tcnding flanges 46 whichare apertured for the passage of fastening members such as rivets 47' whereby they are mounted on the rim and spokes of the harrowv head.

Mounted on the frame structure in convenient proximity to the drivers seat is a rock shaft 48 having a' lever 49 whereby it maybe" rocked, said lever having a stop 'member 50 engaging a segment rack 5l whereby the `parts controlled by the lever may bef retained inv adjusted position. The rQck" shaft has a bifurcated arm 52l straddling a sleeve 53 which is loosely mounted on the shaft 31 between flanges or col-lars 54 on said shaft' which prevent longitudinal displacement of the sleeve. The latter is providedwith pinsy 55 extending on the diametrically opposite sides, each pin extending through a slot 5Gv in the bifurcated arm 52; It willthus be seen that by a proper manipulation of the lever 49, the shaft 3l carrying the harrow head may be raised or lowered and that by the engagement ofthe stop member 50 with the rack 5'1, it will be securely retained in'adjusted position.V A The forward portion ofthe frame structure is provided with bearings fora horizontally disposed,countershaft 57 whichis rotated by means Y of lchains 58 which are trained over sprocket wheels'59 on the axle and over sprocket wheels 60v on the countershaft. -Slidably mounted on the countershaft 57 is' a sleeve 61 carrying at the ends thereo'ftwoy opposed bevel gears 62, G3, either one vof which may be placed in 4engagement with a. beveled gear G4' carried at the upper end of a vertical e shaft 65. The slifd'able sleeve '61 is obviously connected with the countershaft 57'for rotation therewith. and the position ofl said sleevemay be shifted so asto" place either one ofv thebevel gears 62", 63 in engagement with the beveled gear 64, or to place said'bevelgearsGQ, 63' in neutral position, by means of ashipping lever consi'sti'ng' of a bell crank 661 one arm of: which is suitably connected with'the sleevel, the other arm'of said bell? crankl being connected bya rod 67 with a hand lever 68, saidhand level* having astop member? 69A engaging a notched segment 70 whereby the parts may be retained in adjusted position.

Slidably mounted on the shaft for rotation: therewith is the hub 7l of a sprocket wheel 72 over which the forward portion of the transmission chain 38 is trained.: Revolubly mounted on the hub 7l is a ring 73 having rearwardly extending arms or brackets 74, each of said brackets carrying a horizontally disposed supporting roller 74 and a vertically disposed guide roller 75, said rollers serving tol support -and- ,to 1 guide the transmission chain" 38 4which lattery will thus be kept from saggingior from' jumping out of Aenga"gement lwith the sprocket4 wheel!) 72. Revolubly mrnmtedonl the V7l abovethe sprocket wheel 72 is a collar` 761having diametricalflv opposed? radially extending-pins j 77 that engage curved slots 7 8 in the Varms of a b-ifur'cated',shippiiiglever 77-whi'ch is ful'crumed wai'dly eXtendingfarmof saidl shipping lever beingconnected byarod'80 with an arm 81 that extends radially from the rockshaft 48.A It will be seen thatbyfthismechanism, when the rock shaft 48` is rocked by the hand lever 49 for the purposeof raising ror lowering the shaft'Bl that carries the ha-rrow head and the sprocket wheeljr35, a corresponding vertical adjustment will'be im parted to the sprocket Vwheel 72 which is thus maintained' in horizjontal'alinement withv the sprocket'fwheel 35 at all possible adjustments, the importance of'fwhich, for the purpose of maintainingthe transmission chain 38 in operative engagement with the sprocket wheels 72 and 35, will `be obvious. e l

From the foregoing descriptiontake'n in connect-ion with the drawings hereto anneXed,` the operationand advantages of this invention will be readily understood, The

at 78" on a bracket 79, the up-4 construction throughout is simple and eiiec- Y tive, and of Vsuch anature that the harr'ow head my be positively rotated in any plane to which itvvmay be adjusted, and that the direction ofrotation maybe changed at will.

Having thus described the invention, what is claimed as new is `z, Y

l.. In a revolving harrow, a carrying frame having ground wheels, a vertical shaft supported 'forrotation in the frame, harrow head carried' by said shaft, sprocl'retwheel sprocket wheel connected with the harrow head.

2. In a revolving` harrow, a wheel supported frame structure, two vertical shafts supported for rotation in the frame structure, one of said shafts being vertically adjustable, means including a hand lever for effecting vertical adjustment of the shaft, a sprocket wheel rotatable with and vertically adjustable on the second vertical shaft, means for effecting vertical adjustment of the sprocket wheel, said means being operable by the hand lever, a harrow head and a sprocket wheel carried by the vertically adjustable vertical shaft, and a transmission chain trained over said sprocket wheel and over the vertically adjustable sprocket wheel on the second vertical shaft.

3. In a revolving harrow, a wheel supported frame structure, two vertical shafts supported for rotation in the frame structure, one of said shafts being vertically adjustable, means including a hand lever for effecting vertical adjustment of the shaft, a sprocket wheel rotatable with and vertically adjustable on the second vertical shaft, means for effecting vertical adjustment of the sprocket wheel, said means being operable by the hand lever, a harrow head and a sprocket wheel carried by the vertically adjustable vertical shaft, a transmission chain trained over said sprocket wheel and over the vertically adjustable sprocket wheel on the second vertical shaft; the harrow head being provided with blocks supporting the sprocket wheel, said blocks having beveled faces projecting beyond the sprocket wheel, and means for assembling the harrow head, the sprocket wheel and the supporting blocks.

4L. In a revolving harrow, a wheel supported frame, a countershaft driven from the supporting wheels, a vertical shaft receiving motion from the countershaft, means for reversing the direction of rotation of the vertical shaft, a second vertical shaft carrying a harrow head, sprocket wheels on the two vertical shafts, a transmission chain trained over said sprocket wheels, and means for effecting simultaneous vertical adjustment of the 4transmission chain and the sprocket wheels over which it is trained.

5. In a revolving harrow, a wheel supported frame, a countershaft-driven from the supporting wheels, a vertical shaft receiving motion from the countershaft, means for reversing the direction of rotation of the vertical shaft, a second vertical shaft carrying a harrow head, sprocket wheels on the two vertical shafts, a transmission chain trained over said sprocket wheels, and means for eecting simultaneous vertical adjustment of the transmission chain and the sprocket wheels over which it is trained, one of the sprocket wheels being adjustable on and the other sprocket wheel being adjustable with Vthe shaft on which it is mounted.

6. In a revolving harrow, a wheel supported frame, a vertical shaft supported for rotation and for vertical adjustment in said frame, a harrow head carried by said shaft, a second vertical shaft supported for rotation in the frame, a sprocket wheel having a hub supported for rotation with and for vertical adjustment on the second vertical shaft, means for transmitting motion from the supporting wheels to the second vertical shaft and for reversing the direction of rotation, a sprocket wheel mounted on the harrow head and rotatable therewith, a transmission chain trained over the two sprocket wheels, and means for effecting simultaneous vertical adjustment of the shaft carrying the harrow head, the sprocket wheel on the second vert-ical shaft and the transmission chain.

7. In a. revolving harrow, a wheel supported frame, a vertical shaft supported for rotation and for vertical adjustment in said frame, a harrow head carried by said shaft, a second vertical shaft supported for rotation in the frame, a sprocket wheel having a hub supported for rotation with and for vertical adjustment on the second vertical shaft, means for transmitting motion from the supporting wheels to the second vertical shaft and for reversing the direction of rotation, a sprocket wheel mounted on the harrow head and rotatable therewith, a transmission chain trained over the two sprocket wheels, and means for effecting simultaneous vertical adjustment of the shaft carrying the harrow head, the sprocket wheel on the second vertical shaft and the transmission chain, the sprocket wheel which is adjustable on the second vertical shaft be.- ing provided with a ring revolubly mounted on the hub thereof and having rearwardly extending brackets each provided with a horizontally disposed chain supporting roller and a vertically disposed chain guiding roller.

In testimony whereof we aiiix our signatures.

CLYDE V. BROWN. ARCHER RUSSELL.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patente, Washington, D. G. 

